[NET]: Add __dev_getfirstbyhwtype
Add __dev_getfirstbyhwtype for callers that don't want a reference but
some data from the device and thus need to take the rtnl anyway.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index ac0c92b..4428f1c 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -582,6 +582,7 @@
extern unsigned long netdev_boot_base(const char *prefix, int unit);
extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
+extern struct net_device *__dev_getfirstbyhwtype(unsigned short type);
extern void dev_add_pack(struct packet_type *pt);
extern void dev_remove_pack(struct packet_type *pt);
extern void __dev_remove_pack(struct packet_type *pt);
diff --git a/net/core/dev.c b/net/core/dev.c
index eb99900..c305819 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -576,17 +576,28 @@
EXPORT_SYMBOL(dev_getbyhwaddr);
+struct net_device *__dev_getfirstbyhwtype(unsigned short type)
+{
+ struct net_device *dev;
+
+ ASSERT_RTNL();
+ for (dev = dev_base; dev; dev = dev->next) {
+ if (dev->type == type)
+ break;
+ }
+ return dev;
+}
+
+EXPORT_SYMBOL(__dev_getfirstbyhwtype);
+
struct net_device *dev_getfirstbyhwtype(unsigned short type)
{
struct net_device *dev;
rtnl_lock();
- for (dev = dev_base; dev; dev = dev->next) {
- if (dev->type == type) {
- dev_hold(dev);
- break;
- }
- }
+ dev = __dev_getfirstbyhwtype(type);
+ if (dev)
+ dev_hold(dev);
rtnl_unlock();
return dev;
}